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Nrrn TATES IArnNr tries.

TELEGRAPH IQ TRANSMITTER.

SPECIFICATION formingpart of Letters Patent No. 295,075, dated March 11,1884.

Application filed September 13,1883. (No model.) i

To all whom it may concern:

Be it known that I, Ross C. STONE, a citizen of the United States,residing at New York,

in the county of New York and State of New York, have invented certainnew and useful Improvements in Telegraphinstruments, of which thefollowing is a specification, referones being had therein to theaccompanying drawings.

This invention relates to my case filed Auter or mark which can beformed in this mannor, the rotation being caused by a frictionwheellocated on the said revolving bar, which is brought in contact withanother frictionwheel, which is in constant motion through theinstrumentality of clock-work or other suit able means. 7

The object of my present invention is to provide means for bringing theaforesaid wheel in contact with the latter-named wheel, and to keep themin contact long enough to cause one revolution of first-named wheel, andthen separate them, so that the revolving bar cannot make more than onerevolution, which is sufficient to form in telegraphic character anydesired letter, number, or mark by the means provided in saidapplication.

In my drawings, Figure 1 represents a side outline view of my improveddevice. Fig. 2 is a plan of the cam and its locking device.

A is the revolving bar or spindle, which carries circuit-breaker E, andis supported at the top by the sliding box N, which moves in thedirection of the arrow when forced to do so,

as hereinafter described. The said box N is connected with one end ofthe spring-plate Q, which is composed of a strip or strips of thin steelor other suitable material, while the other end of said plate is securedto the frame at the frame and the oscillating box N hence when weight isplaced upon the center of the said spring Q the effect is to drawthe-box in the direction of the arrow. I propose to apply this weight bythe operating-key 1? through the medium of the rod R. The rod R has anotch, 02, at one side. A pivoted latch or catch, 0, is adapted toengage with this notch. This catch is pivoted in an'extension of asleeve, U, which has a projection, G, at one side. The sleeve U isloosely connected, as by a pin, a, with the rod B, so that the rodcanhave alengthwise movement in the sleeve when not latched thereto bythe engagement of catch 0 in notch 01. An extension, Z, from said catchbears against face-earn W' on shaft A. Thus, when the shaft or spindle Arevolves, the cam W will tend to throw the catch 0 out of the notch inrod R. A spring, S, tends to throw said catch into engagement with therod. The object of this part of the invention is to libcrate theoperating-key after it has performed 1 its part of the work, so that notwo letters can be formed by one operation of the key, or, in otherwords, after a letter hasbeen produced. the key must be allowed to riseto its original position and be pressed again before another operationcan be performed to produce another letter or mark, while the accidentalslacking of the key will not interfere with the In my drawings Ishow arevolving disk, V,

which is located upon the bar A, and is provided with a face-cam, WV,which operates the arm Z, which in turn operates the latch O. The saiddisk is provided with a notch, (see Fig. 2,) in which moves one end ofthe plate G, the other end thereof being secured to or made apart of theattachment U, so that when the key is pressed the end of the said plateis moved downward through the notch, as shown in Fig. 1; but thisoperation causes the box N to move in the direction of thearrow,bringing the friction-wheel L in contact with another-friction-wheel, as described in Case B. The

disk or plate V, which is secured to said spindle, is caused to revolve.This of course catches the plate G under the rim of the said disk andholds it there until the spindle has made one complete revolution,during which the cam W acts upon arm Z, forcing the latch O to liberatethe key inthe manner named, and as the said key is urged in an upwarddirection by a spring, S, the following result is obtained: The keybeing pressed, the revolving bar is started. This immediately locks thefriction-wheels in contact, as shown in Case B, until one revolution ofthe friction bar is made, (during which the keyis liberated to preventthe same from interfering with the stop, which is necessary at the endof every 1'evolution,) when the key is allowed to occupy its originalposition. The pawl at the end of each revolution reunites the key withthe other parts, so as to repeat the operation, when desired, ofrevolving the bar A, which is so revolved for the purpose of opening andclosing an electricalcircuit to form letters or signs, as more fullydescribed in Case B, above referred to. It will thus be seen that theplate G at the end of each revolution flies or springs up into thenotch, as shown in Fig. 2, and thus prevents any further motion untilthe key is again I pressed; hence it is impossible to make a misrightkey is pressed to begin with.

What I claim here as my invention, and desire to secure by LettersPatent of the United States, is

1. The combination, with a spindle adapted by its rotation to open orclose an electrical circuit, of a key and connecting mechanism adapted,as described, to unlock said spindle, and mechanism, substantially asdescribed, adapted to lock the spindle when it has completed a singlerevolution, as set forth.

2. The combination, with a spindle adapted by its rotation to open andclose an electrical circuit, of a locking-plate thereon, a lockingdevice engaging with said plate, and a key adapted to disengage thelocking device from the notch in the plate, as set forth.

3. The combination, with a spindle of the character described, of anotched disk thereon, a locking device engaging the notch in said disk,a key adapted to disengage the locking device from said disk, andmechanism, substantially as described, which holds the looking mechanismfrom the disk during one revolution of the spindle, but locks thespindle at the completion of the revolution, as set forth.

4. A spindle adapted by its rotation to open and close an electricalcircuit, a notched disk position while the spindle is revolved,substantially as described, all the elements in combination, as setforth.

5. A spindle adapted by its rotation to open and close an electricalcircuit, a notched disk on said spindle, a locking device adapted toengage the notch in said disk when in one position, but to be forced outof the notch and held out by the disk during one revolution of thespindle, a spring which tends to press the locking device into the notchof the'disk, a

key for forcing the locking deviceout of the notch in the disk, andmechanism,as described, for releasing the key from the locking devicewhile the spindle rotates, all in combination,

as set forth.

6. The spring-key, the locking device secured loosely thereto, a springtending to draw the locking device into the notch in the disk, a spindleof the character described, which carries said disk and a cam, and alatch actuated by said cam to disconnect the key from the lockingdevice, all in combination, sub stantially as stated.

7. A spindle of the character described, a notched disk thereon,provided with a facecam, as set forth, a locking device adapted toengage the notch in the disk when forced into said notch by a spring, aspring-key adapted to force the locking device out of the notch in thedisk, a latch which normally holds the locking device in position tomove with the key, but is operated to release the key from the lockingdevice by the action of the cam, and a spring which tends to force thelatch into engagement with the key, the specified elements incombination, all substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ROSS c. STONE.

\Vitnesses:

S. H. WALKER,

Ronr. M. FRYER.

